многопоточность

Concurrency in Swift, particularly with the introduction of Swift 6, focuses on ensuring data race safety and improving the reliability of concurrent code. Swift 6 introduces full enforcement of data isolation, which helps prevent accidental sharing of state between tasks and actors. This is achieved by making data race issues compile-time errors, thus improving the security and stability of applications.

Key concepts related to concurrency in Swift include:

• Tasks: The fundamental unit of concurrency in Swift, representing an independent concurrent execution context. Tasks are lightweight and can perform asynchronous operations, suspending to yield the CPU to other tasks when waiting for an operation to complete.

• Actors: A feature in Swift that encapsulates shared mutable state and automatically protects it by serializing accesses. This ensures that only a single task can execute at a time on an actor, making concurrent accesses safe.

• Sendable: A protocol that ensures values shared between concurrency domains are safe from concurrent accesses. Types that conform to Sendable protect their state, often by acquiring locks during read and write operations.

• Data Race Safety: Swift 6 achieves data race safety by default, turning potential data race issues into compile-time errors. This significantly reduces the risk of runtime crashes and unpredictable behavior due to concurrent data access.

For more detailed information on concurrency in Swift, you can refer to the session A Swift Tour: Explore Swift’s features and design (18:33).